post_process is applied multiple times for cached cells?

[nikosavola]

Describe the bug post_process for the @cell decorator appears behave differently than in gdsfactory 7. It seems to be applied multiple times for cached cells.

To Reproduce The MWE here is in gdsfactory but the problem stems from kfactory:

from functools import partial

import gdsfactory as gf

SOME_LAYER = (1, 0)

def add_component_name_label_on_layer(component, layer) -> None:
    component.add_label(
        component.name,
        position=component.ports[0].dcplx_trans * gf.kdb.DPoint(-0.1, 0),
        layer=layer,
    )

def test_no_duplicate_labels():

    @gf.cell(
        post_process=[partial(add_component_name_label_on_layer, layer=SOME_LAYER)]
    )
    def component_with_label(**kwargs):
        c = gf.components.straight(**kwargs)
        return c

    @gf.cell
    def container():
        c = gf.Component()
        c1 = c << component_with_label()
        c2 = c << component_with_label()
        c2.move((0, 5))
        c3 = c << component_with_label()
        c3.move((0, 10))
        return c

    c = container()
    c.show()

    assert len(c.get_labels(layer=SOME_LAYER)) == 3  # We get 9 == 3

Expected behavior We would have 3 straights with one label each. Instead, all of the straights have 3 duplicated labels.

Screenshots

Normal view

After moving text labels that are duplicated

[nikosavola]

@joamatab @sebastian-goeldi